Illustration of octopus
- octopus 1
octopus
noun
oc·to·pus
ˈäk-tə-pəs
-ˌpu̇s
plural octopuses or octopi
ˈäk-tə-ˌpī
1
plural also octopodes
äk-ˈtä-pə-ˌdēz
-ˈtō-
: any of a genus (Octopus) of cephalopod mollusks that have eight muscular arms equipped with two rows of suckers
broadly
: any octopod excepting the paper nautilus
2
: something that resembles an octopus especially in having many centrally directed branches
… an octopus of a corporation which lends, buys, produces, and sells.—Atlantic
The Plurals of Octopus: Usage Guide
The plurals of octopus are octopi, octopuses, and octopodes. Octopi is the oldest, having been adopted in the belief that words of Latin origin should have Latin plural forms. Though octopus did enter English via New Latin, it is in fact ultimately from Greek. For this reason, it was later given the Greek plural octopodes. In between the adoption of these etymology-based plural forms the word also gained a regular English plural: octopuses. This is now the most common plural form, with octopi also seeing some regular use. Octopodes is rare, but all three are accepted.
Cite this Entry
“Octopus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octopus. Accessed 7 Sep. 2026.
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